dissident

dissident
[ˈdɪsɪd(ə)nt]
noun
  1. a person who opposes official policy, especially that of an authoritarian state
    持不同政见者
adjective
  1. in opposition to official policy
    持不同政见的
    the measure was supported by dissident Tories.
    这项措施得到持不同政见的保守党党员的支持。
语源
  1. mid 16th cent. (in the sense 'differing in opinion or character'): from Latin dissident- 'sitting apart, disagreeing', from dis- 'apart' + sedere 'sit'
英语宝典
考试词汇表